请为我编写java的elasticsearch通过id列表获取记录的方法
时间: 2024-04-08 22:30:28 浏览: 164
当然,下面是一个通过ID列表从Elasticsearch中获取记录的Java示例代码:
```java
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.IdsQueryBuilder;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.FetchSourceContext;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class ElasticsearchUtils {
public static List<String> getRecordsByIds(RestHighLevelClient client, String index, List<String> ids) throws IOException {
List<String> records = new ArrayList<>();
// 创建查询构建器
IdsQueryBuilder queryBuilder = new IdsQueryBuilder();
queryBuilder.addIds(ids.toArray(new String[0]));
// 创建搜索源构建器
SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
sourceBuilder.query(queryBuilder);
// 设置需要返回的字段(可选)
String[] includes = new String[]{"field1", "field2"}; // 替换为您需要的字段
FetchSourceContext sourceContext = new FetchSourceContext(true, includes, null);
sourceBuilder.fetchSource(sourceContext);
// 创建搜索请求
SearchRequest searchRequest = new SearchRequest(index);
searchRequest.source(sourceBuilder);
// 执行搜索请求
SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
// 处理搜索结果
for (SearchHit hit : searchResponse.getHits().getHits()) {
String record = hit.getSourceAsString();
records.add(record);
}
return records;
}
// 示例用法
public static void main(String[] args) {
// 创建Elastic
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